package chapter03.example;
class Student2{
    String name;
    int age;
    void read(){
        System.out.println("大家好，我是"+name+",年龄"+age);
    }
}
public class Example02 {
    public static void main(String[] args){
        Student stu1 = new Student();
            Student stu2 = null;
            stu2 = stu1;
            stu1.name = "小明";
            stu1.age = 20;
            stu2.age = 50;
            stu1.read();
            stu2.read();
        }
    }

